Kosher Certification of Plant-Based Meat Products

(1) The LORD spoke to Moses and Aaron, saying to them: (2) Speak to the Israelite people thus:
These are the creatures that you may eat from among all the land animals: (3) any animal that has true hoofs, with clefts through the hoofs, and that chews the cud—such you may eat. (4) The following, however, of those that either chew the cud or have true hoofs, you shall not eat: the camel—although it chews the cud, it has no true hoofs: it is unclean for you; (5) the daman—although it chews the cud, it has no true hoofs: it is unclean for you; (6) the hare—although it chews the cud, it has no true hoofs: it is unclean for you; (7) and the swine—although it has true hoofs, with the hoofs cleft through, it does not chew the cud: it is unclean for you. (8) You shall not eat of their flesh or touch their carcasses; they are unclean for you. (9) These you may eat of all that live in water: anything in water, whether in the seas or in the streams, that has fins and scales—these you may eat. (10) But anything in the seas or in the streams that has no fins and scales, among all the swarming things of the water and among all the other living creatures that are in the water—they are an abomination for you (11) and an abomination for you they shall remain: you shall not eat of their flesh and you shall abominate their carcasses. (12) Everything in water that has no fins and scales shall be an abomination for you. (13) The following you shall abominate among the birds—they shall not be eaten, they are an abomination: the eagle, the vulture, and the black vulture; (14) the kite, falcons of every variety; (15) all varieties of raven; (16) the ostrich, the nighthawk, the sea gull; hawks of every variety; (17) the little owl, the cormorant, and the great owl; (18) the white owl, the pelican, and the bustard; (19) the stork; herons of every variety; the hoopoe, and the bat. (20) All winged swarming things that walk on fours shall be an abomination for you. (21) But these you may eat among all the winged swarming things that walk on fours: all that have, above their feet, jointed legs to leap with on the ground— (22) of these you may eat the following: locusts of every variety; all varieties of bald locust; crickets of every variety; and all varieties of grasshopper. (23) But all other winged swarming things that have four legs shall be an abomination for you. (24) And the following shall make you unclean—whoever touches their carcasses shall be unclean until evening, (25) and whoever carries the carcasses of any of them shall wash his clothes and be unclean until evening— (26) every animal that has true hoofs but without clefts through the hoofs, or that does not chew the cud. They are unclean for you; whoever touches them shall be unclean. (27) Also all animals that walk on paws, among those that walk on fours, are unclean for you; whoever touches their carcasses shall be unclean until evening. (28) And anyone who carries their carcasses shall wash his clothes and remain unclean until evening. They are unclean for you. (29) The following shall be unclean for you from among the things that swarm on the earth: the mole, the mouse, and great lizards of every variety; (30) the gecko, the land crocodile, the lizard, the sand lizard, and the chameleon. (31) Those are for you the unclean among all the swarming things; whoever touches them when they are dead shall be unclean until evening... (42) You shall not eat, among all things that swarm upon the earth, anything that crawls on its belly, or anything that walks on fours, or anything that has many legs; for they are an abomination. (45) For I the LORD am He who brought you up from the land of Egypt to be your God: you shall be holy, for I am holy. (46) These are the instructions concerning animals, birds, all living creatures that move in water, and all creatures that swarm on earth, (47) for distinguishing between the unclean and the clean, between the living things that may be eaten and the living things that may not be eaten.

(3) The law only applies with meat from a pure [kosher] animal and milk from a pure animal, but meat of a pure animal in milk that is impure, or meat from an impure animal in pure milk, is permitted to cook and benefit from. Meat of a wild animal and of fowl, even in milk which is pure, is permitted to cook and benefit from; and even eating is only prohibited rabbinically. Fish and grasshoppers are not prohibited [with milk] even rabbinically. RAMA: We make milk from almonds and place bird meat in it, since [milk and bird meat] is only rabbinically [forbidden]. But with meat from a domesticated animal, place almonds next to the milk, so that people don't misunderstand. This is as we said above, in chapter 66.

Rav Yehuda said that Rav said: Wherever the Sages prohibited an action due to the appearance of prohibition, even in the innermost chambers, where no one will see it, it is prohibited. When prohibiting an action, the Sages did not distinguish between different circumstances. They prohibited performing the action in all cases.